This Vienna bridge multi-band oscillator circuit was found in a 1974 Ferranti transistor manual. The circuit generates signals from 25 Hz to 1 MHz in 5 bands selected by the capacitors.
Found in a 1970 EEE, this circuit can be applied to TTL ports. The supply is 5 V and the...
This circuit is from a 90s Popular Electronics. The integrated circuit is from that time. The...
This automation control circuit uses two relays to control 4 loads using just one switch. The...